I have an opportunity to purchase  this B&O gear, it consists of a master control panel 5000, Beomaster 5000, Beogram 5000 and a Recording 5000. these components look to be in very nice shape but I haven't had a demo yet to see if all is in working order. it has been stored away for a number of years and i don't know much about this equipment or its worth. your hep would be appreciated, thank you.